Watch: A week inside an active volcano

Camping 200m inside an active volcano is understandably hot. Abseil 300m beyond that and you're not far away from cooking. "It would be like running a marathon with a wetsuit on," Auckland-based Geoff Mackley explained to the Herald on Sunday this morning from a hotel in Port Vila, the capital of Vanuatu. "It's very hot," he said. "It really saps your energy -- it's just extremely hot." Mackley was back in Port Vila recovering after leading a week-long volcanic expedition alongside fellow Auckland explorer and photographer Bradley Ambrose and Chris Horsley from England. Video/ Daniel Hines, Geoff Mackley & Bradley Ambrose

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